摘要
黄龙病是柑桔最严重的传染性病害,其病原菌在病株地上各部位和根部均有分布,主要通过病芽嫁接和柑桔木虱Diaphorina citri Kuwayama进行传播。本文研究了黄龙病通过柑桔根部传病的可能性。结果表明,将感染黄龙病的红皮山桔实生苗与健康沙糖桔苗(红皮山桔砧)直接合种在一起,3年后健苗均没有发病;通过嫁接将病苗和健苗的一对侧根接合后合种,6个月后30株健苗中有1株感病,9个月后感染数达到9株,12个月后为11株,感染率达36.7%。说明,病树和健树根系直接交叉生长不能传播黄龙病,但通过根嫁接使病健苗的根接合在一起则可以传播黄龙病,且传播效率较高。
Huanglongbing （HLB） is the most destructive disease of citrus. The pathogen of this disease not only distributes in the whole aerial parts, but also in the roots of the infected citrus trees. It is mainly transmitted by bud grafting and vector insect, Diaphorina citri Kuwayama. In this research, the possibility to transmit the HLB by infected roots was studied. The results showed that HLB was not transmitted from the infected plants to healthy plants through roots when they were just planted together even after 3 years. While the roots of healthy plant were grafted with the roots of infected plant, one of the 30 healthy young plants was infected after 6 months. Nine healthy plants were infected after 9 months, and 11 plants were infected with the total infected rate reached 36.67 % one year after root grafting. The results demonstrated that infected citrus root is not able to transmit HLB directly, but through root grafting.
出处
《中国南方果树》
北大核心
2015年第4期1-4,共4页
South China Fruits
基金
公益性行业(农业)科研专项(201003067)
现代农业(柑桔)产业技术体系项目(CARS-27)资助
关键词
黄龙病
柑桔
根系
嫁接
传病
huanglongbing
citrus
root
grafting
disease transmission
